Windows 7 SP1 Language Packs (Original MUI Download)

The Windows 7 SP1 RTM has been finalized and released by Microsoft. With each new major version revision of Windows 7, the MUI (Multilingual User Interface) language packs has to be updated too. The Windows 7 MUI language packs (not to be confused with LIP language packs which are available free for all) are available to Windows 7 Ultimate and Enterprise editions only.
Language packs are normally available for download via Windows Update. Microsoft does release standalone update packages in .cab cabinet files format in the form of DVD ISO image, typically to volume licensing customers, MSDN or TechNet subscribers and OEM partners, which can be used for offline installation or slipstream into Windows 7 ISO image. Adding one or more language packs to a Windows 7 image enables one or more languages in the installed Windows Client operating system, allowing corporations to deploy the same Windows 7 image worldwide while still providing localized user interfaces.

As Windows 7 SP1 is not officially launched yet, the language packs for Windows 7 SP1 is not yet available in Windows Update. But the Windows 7 SP1 MUI language packs have also been leaked, and available for free download via BitTorrent (BT) network and various file hosting services.